{"id":307651,"date":"2024-05-20T20:41:00","date_gmt":"2024-05-20T12:41:00","guid":{"rendered":""},"modified":"2024-05-20T20:41:09","modified_gmt":"2024-05-20T12:41:09","slug":"c-winform%e5%a6%82%e4%bd%95%e5%b0%86datatable%e4%b8%ad%e6%af%8f%e5%88%97%e6%95%b0%e6%8d%ae%e9%83%bd%e8%bd%ac%e4%b8%balist%e5%bd%a2%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/307651.html","title":{"rendered":"c# winform\u5982\u4f55\u5c06datatable\u4e2d\u6bcf\u5217\u6570\u636e\u90fd\u8f6c\u4e3alist\u5f62\u5f0f"},"content":{"rendered":"

\"c#<\/p>\n

C# WinForm\u4e2d\u5c06DataTable\u4e2d\u7684\u6bcf\u5217\u6570\u636e\u8f6c\u6362\u4e3aList\u5f62\u5f0f\u4e3b\u8981\u6d89\u53ca\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a\u521b\u5efaList\u6cdb\u578b\u96c6\u5408\u3001\u904d\u5386DataTable\u7684\u5217\u3001\u5c06\u6bcf\u5217\u6570\u636e\u6dfb\u52a0\u5230\u5bf9\u5e94\u7684List\u4e2d\u3001\u5904\u7406\u6570\u636e\u7c7b\u578b\u8f6c\u6362<\/strong>\u3002\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5c06DataTable\u4e2d\u7684\u6570\u636e\u6309\u5217\u5206\u7c7b\uff0c\u65b9\u4fbf\u540e\u7eed\u5904\u7406\u548c\u5206\u6790\u3002<\/p>\n<\/p>\n

\u5177\u4f53\u64cd\u4f5c\u8d77\u6765\u5341\u5206\u76f4\u89c2\uff0c\u6211\u4eec\u901a\u5e38\u4f1a\u904d\u5386DataTable\u7684Columns\u5c5e\u6027\u6765\u4f9d\u6b21\u5904\u7406\u6bcf\u4e00\u5217\u6570\u636e\uff0c\u4f7f\u7528\u4f8b\u5982List\u7c7b\u6765\u5b58\u50a8\u5404\u5217\u6570\u636e\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8eDataTable\u4e2d\u7684\u6570\u636e\u7c7b\u578b\u662fobject\uff0c\u6240\u4ee5\u5728\u6dfb\u52a0\u5230List\u4e2d\u65f6\u53ef\u80fd\u9700\u8981\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u521b\u5efaLIST\u6cdb\u578b\u96c6\u5408<\/h3>\n<\/p>\n

\u9996\u5148\uff0c\u521b\u5efa\u4e0eDataTable\u4e2d\u5404\u5217\u6570\u636e\u7c7b\u578b\u76f8\u5bf9\u5e94\u7684List\u6cdb\u578b\u96c6\u5408\u3002List\u96c6\u5408\u7684\u597d\u5904\u662f\u7c7b\u578b\u5b89\u5168\u4e14\u52a8\u6001\u53ef\u4f38\u7f29\uff0c\u975e\u5e38\u9002\u5408\u7528\u6765\u5b58\u50a8\u5217\u6570\u636e\u3002<\/p>\n<\/p>\n

DataTable dt = \/* \u5047\u8bbe\u8fd9\u91cc\u521d\u59cb\u5316\u4e86\u4e00\u4e2aDataTable *\/;<\/p>\n
List<int> firstColumnData = new List<int>();     \/\/ \u5047\u5b9a\u7b2c\u4e00\u5217\u4e3aint\u7c7b\u578b\u6570\u636e<\/p>\n
List<string> secondColumnData = new List<string>();  \/\/ \u5047\u5b9a\u7b2c\u4e8c\u5217\u4e3astring\u7c7b\u578b\u6570\u636e<\/p>\n
\/\/ \u4ee5\u6b64\u7c7b\u63a8\uff0c\u4e3a\u6bcf\u4e00\u5217\u521d\u59cb\u5316\u4e00\u4e2aList\u96c6\u5408<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u904d\u5386DATATABLE\u7684\u5217<\/h3>\n<\/p>\n
\u63a5\u7740\uff0c\u4f60\u9700\u8981\u5bf9DataTable\u5bf9\u8c61\u8fdb\u884c\u904d\u5386\u3002\u8fd9\u6837\u53ef\u4ee5\u8bbf\u95ee\u5230DataTable\u4e2d\u7684\u6bcf\u4e00\u884c\uff0c\u518d\u4ece\u4e2d\u63d0\u53d6\u51fa\u6bcf\u4e00\u5217\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n
foreach (DataRow row in dt.Rows)<\/p>\n
{<\/p>\n
    firstColumnData.Add((int)row["\u7b2c\u4e00\u5217\u7684\u5217\u540d"]);<\/p>\n
    secondColumnData.Add(row["\u7b2c\u4e8c\u5217\u7684\u5217\u540d"].ToString());<\/p>\n
    \/\/ \u5c06\u6bcf\u884c\u7684\u5217\u6570\u636e\u5206\u522b\u6dfb\u52a0\u5230\u5bf9\u5e94\u7684List\u4e2d<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u5c06\u6bcf\u5217\u6570\u636e\u6dfb\u52a0\u5230\u5bf9\u5e94\u7684LIST\u4e2d<\/h3>\n<\/p>\n
\u5728\u4e0a\u8ff0\u904d\u5386\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7\u5217\u540d\u6216\u8005\u7d22\u5f15\u6765\u83b7\u53d6\u6bcf\u5217\u7684\u503c\uff0c\u5e76\u5c06\u503c\u6dfb\u52a0\u5230\u5148\u524d\u521b\u5efa\u7684\u5bf9\u5e94\u7c7b\u578b\u7684List\u4e2d\u3002\u8fd9\u91cc\u9700\u8981\u7559\u610f\u5c06object\u7c7b\u578b\u7684\u6570\u636e\u8f6c\u6362\u6210\u76f8\u5e94\u7684\u7c7b\u578b\u3002<\/p>\n<\/p>\n
\/\/ \u793a\u4f8b\uff1a\u8f6c\u6362\u6570\u636e\u5e76\u6dfb\u52a0\u5230List\u4e2d<\/p>\n
foreach (DataRow row in dt.Rows)<\/p>\n
{<\/p>\n
    if(!Convert.IsDBNull(row["\u7b2c\u4e00\u5217\u7684\u5217\u540d"]))<\/p>\n
    {<\/p>\n
        firstColumnData.Add(Convert.ToInt32(row["\u7b2c\u4e00\u5217\u7684\u5217\u540d"]));<\/p>\n
    }<\/p>\n
    if(!Convert.IsDBNull(row["\u7b2c\u4e8c\u5217\u7684\u5217\u540d"]))<\/p>\n
    {<\/p>\n
        secondColumnData.Add(row["\u7b2c\u4e8c\u5217\u7684\u5217\u540d"].ToString());<\/p>\n
    }<\/p>\n
    \/\/ \u91cd\u590d\u8fd9\u4e2a\u8fc7\u7a0b\uff0c\u76f4\u5230DataTable\u4e2d\u6240\u6709\u5217\u7684\u6570\u636e\u90fd\u88ab\u52a0\u5165\u5230\u5bf9\u5e94\u7684List\u4e2d<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u5904\u7406\u6570\u636e\u7c7b\u578b\u8f6c\u6362<\/h3>\n<\/p>\n
\u7531\u4e8eDataTable\u7684\u6570\u636e\u7c7b\u578b\u662fobject\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u5bf9\u503c\u8fdb\u884c\u9002\u5f53\u7684\u7c7b\u578b\u8f6c\u6362\u6216\u8005\u68c0\u67e5\u4ee5\u907f\u514dInvalidCastException\u5f02\u5e38\u3002\u5bf9\u4e8e\u53ef\u4e3a\u7a7a\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f7f\u7528Convert.IsDBNull<\/code>\u65b9\u6cd5\u6765\u5224\u65ad\u6570\u636e\u662f\u5426\u4e3aDBNull\u3002<\/p>\n<\/p>\n
\/\/ \u7c7b\u578b\u8f6c\u6362\u65f6\u5efa\u8bae\u4f7f\u7528Convert\u7c7b\u4ee5\u907f\u514dnull\u503c\u5bfc\u81f4\u7684\u5f02\u5e38<\/p>\n
foreach (DataRow row in dt.Rows)<\/p>\n
{<\/p>\n
    firstColumnData.Add(Convert.IsDBNull(row["\u7b2c\u4e00\u5217\u7684\u5217\u540d"]) ? default(int) : Convert.ToInt32(row["\u7b2c\u4e00\u5217\u7684\u5217\u540d"]));<\/p>\n
    secondColumnData.Add(Convert.IsDBNull(row["\u7b2c\u4e8c\u5217\u7684\u5217\u540d"]) ? default(string) : row["\u7b2c\u4e8c\u5217\u7684\u5217\u540d"].ToString());<\/p>\n
    \/\/ \u7ee7\u7eed\u5904\u7406\u540e\u7eed\u5217<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4ee5\u4e0a\u6b65\u9aa4\u6982\u8ff0\u4e86\u5c06DataTable\u4e2d\u7684\u6570\u636e\u6309\u5217\u8f6c\u6362\u4e3aList\u6cdb\u578b\u96c6\u5408\u7684\u57fa\u672c\u65b9\u6cd5\u3002\u8fd9\u79cd\u7b56\u7565\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u6570\u636e\u64cd\u4f5c\u7684\u7075\u6d3b\u6027\uff0c\u5c24\u5176\u662f\u5728\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u5904\u7406\u65f6\u3002\u4f7f\u7528\u5f3a\u7c7b\u578b\u7684List\u96c6\u5408\u4e5f\u4e3a\u6570\u636e\u63d0\u4f9b\u4e86\u66f4\u597d\u7684\u5c01\u88c5\uff0c\u4f7f\u4ee3\u7801\u66f4\u6613\u4e8e\u7ef4\u62a4\u548c\u7406\u89e3\u3002\u5728\u7f16\u5199\u6b64\u7c7b\u8f6c\u6362\u4ee3\u7801\u65f6\uff0c\u5f00\u53d1\u4eba\u5458\u5e94\u5f53\u5c0f\u5fc3\u5904\u7406\u7a7a\u503c\u548c\u7c7b\u578b\u8f6c\u6362\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u7a0b\u5e8f\u7684\u5065\u58f2\u3002<\/p>\n<\/p>\n
\u5728\u5b9e\u9645\u8fd0\u7528\u4e2d\uff0c\u6839\u636e\u9700\u8981\u5904\u7406\u7684\u6570\u636e\u7c7b\u578b\u548c\u4e1a\u52a1\u903b\u8f91\u7684\u4e0d\u540c\uff0c\u8fd8\u53ef\u80fd\u9700\u8981\u8fdb\u884c\u66f4\u591a\u7684\u5f02\u5e38\u5904\u7406\u548c\u6570\u636e\u6821\u9a8c\u3002\u53e6\u5916\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u53ef\u4ee5\u5c01\u88c5\u6210\u65b9\u6cd5\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u91cd\u7528\u6027\u548c\u964d\u4f4e\u7cfb\u7edf\u7684\u8026\u5408\u5ea6\u3002\u901a\u8fc7\u4e0d\u65ad\u4f18\u5316\u548c\u6539\u8fdb\u8fd9\u6837\u7684\u6570\u636e\u8f6c\u6362\u8fc7\u7a0b\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u8f6f\u4ef6\u7684\u8d28\u91cf\u548c\u7528\u6237\u7684\u4f53\u9a8c\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u5c06C# WinForm\u4e2d\u7684DataTable\u6bcf\u5217\u6570\u636e\u8f6c\u4e3aList\u5f62\u5f0f\uff1f<\/strong><\/p>\n
\u5982\u679c\u4f60\u60f3\u8981\u5c06DataTable\u4e2d\u7684\u6bcf\u4e00\u5217\u6570\u636e\u90fd\u8f6c\u6362\u4e3aList\u5f62\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n
    \n
  1. \u521b\u5efa\u4e00\u4e2a\u7a7a\u7684List\u96c6\u5408\uff0c\u7528\u4e8e\u5b58\u50a8\u8f6c\u6362\u540e\u7684\u6570\u636e\u3002<\/li>\n
  2. \u904d\u5386DataTable\u7684\u5217\u96c6\u5408\uff0c\u5bf9\u6bcf\u4e00\u5217\u8fdb\u884c\u5904\u7406\u3002<\/li>\n
  3. \u9488\u5bf9\u6bcf\u4e00\u5217\uff0c\u521b\u5efa\u4e00\u4e2a\u5bf9\u5e94\u7684List\u96c6\u5408\u3002<\/li>\n
  4. \u904d\u5386DataTable\u7684\u6bcf\u4e00\u884c\uff0c\u5c06\u6bcf\u4e00\u884c\u7684\u5bf9\u5e94\u5217\u6570\u636e\u6dfb\u52a0\u5230\u8be5\u5217\u7684List\u96c6\u5408\u4e2d\u3002<\/li>\n
  5. \u5c06\u6bcf\u4e00\u5217\u7684List\u96c6\u5408\u6dfb\u52a0\u5230\u4e4b\u524d\u521b\u5efa\u7684\u7a7aList\u96c6\u5408\u4e2d\u3002<\/li>\n
  6. \u8fd4\u56de\u5305\u542b\u6240\u6709\u5217\u6570\u636e\u7684List\u96c6\u5408\u3002<\/li>\n<\/ol>\n
    2. C# WinForm\u4e2d\u5982\u4f55\u5c06DataTable\u7684\u6bcf\u4e00\u5217\u6570\u636e\u8f6c\u6362\u4e3aList\u7684\u5f62\u5f0f\uff1f<\/strong><\/p>\n
    \u5c06DataTable\u4e2d\u7684\u6bcf\u4e00\u5217\u6570\u636e\u8f6c\u6362\u4e3aList\u5f62\u5f0f\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\u5b9e\u73b0\uff1a<\/p>\n
      \n
    1. \u83b7\u53d6DataTable\u7684\u5217\u96c6\u5408\u3002<\/li>\n
    2. \u904d\u5386\u5217\u96c6\u5408\uff0c\u5bf9\u6bcf\u4e00\u5217\u8fdb\u884c\u5904\u7406\u3002<\/li>\n
    3. \u521b\u5efa\u4e00\u4e2a\u65b0\u7684List\u96c6\u5408\uff0c\u7528\u4e8e\u5b58\u50a8\u8be5\u5217\u6570\u636e\u7684\u8f6c\u6362\u7ed3\u679c\u3002<\/li>\n
    4. \u904d\u5386DataTable\u7684\u6bcf\u4e00\u884c\uff0c\u5c06\u5f53\u524d\u884c\u5bf9\u5e94\u5217\u7684\u6570\u636e\u52a0\u5165\u5230List\u96c6\u5408\u4e2d\u3002<\/li>\n
    5. \u5c06\u8be5\u5217\u7684List\u96c6\u5408\u52a0\u5165\u5230\u603b\u7684\u7ed3\u679c\u96c6\u5408\u4e2d\u3002<\/li>\n
    6. \u8fd4\u56de\u8f6c\u6362\u540e\u7684\u7ed3\u679c\u96c6\u5408\u3002<\/li>\n<\/ol>\n
      3. \u5728C# WinForm\u4e2d\uff0c\u5982\u4f55\u5c06DataTable\u7684\u5404\u5217\u6570\u636e\u5206\u522b\u8f6c\u6362\u4e3aList\u683c\u5f0f\uff1f<\/strong><\/p>\n
      \u82e5\u4f60\u60f3\u8981\u5c06DataTable\u4e2d\u7684\u6bcf\u4e00\u5217\u6570\u636e\u5206\u522b\u8f6c\u6362\u4e3aList\u7684\u683c\u5f0f\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n
        \n
      1. \u5faa\u73af\u904d\u5386DataTable\u7684\u5217\u96c6\u5408\u3002<\/li>\n
      2. \u5bf9\u4e8e\u6bcf\u4e00\u5217\uff0c\u521b\u5efa\u4e00\u4e2a\u5bf9\u5e94\u7684List\u96c6\u5408\uff0c\u7528\u4e8e\u5b58\u50a8\u8be5\u5217\u7684\u6570\u636e\u3002<\/li>\n
      3. \u904d\u5386DataTable\u7684\u6bcf\u4e00\u884c\uff0c\u5c06\u5f53\u524d\u884c\u5bf9\u5e94\u5217\u7684\u6570\u636e\u52a0\u5165\u5230\u8be5\u5217\u7684List\u96c6\u5408\u4e2d\u3002<\/li>\n
      4. \u5c06\u6bcf\u4e00\u5217\u7684List\u96c6\u5408\u5b58\u50a8\u5728\u4e00\u4e2a\u5b57\u5178\u6216\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u4e2d\uff0c\u952e\u4e3a\u5217\u540d\u3002<\/li>\n
      5. \u8fd4\u56de\u5b57\u5178\u6216\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2d\u5305\u542b\u6bcf\u5217\u6570\u636e\u7684List\u96c6\u5408\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"C# WinForm\u4e2d\u5c06DataTable\u4e2d\u7684\u6bcf\u5217\u6570\u636e\u8f6c\u6362\u4e3aList\u5f62\u5f0f\u4e3b\u8981\u6d89\u53ca\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a\u521b\u5efaList\u6cdb\u578b […]","protected":false},"author":3,"featured_media":307659,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/307651"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=307651"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/307651\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/307659"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=307651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=307651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=307651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}